I'm sure I read that 100% mixcture goes in and then if it needs topping up then you add water. Thought I also read that antifreeze disperses heat better than water so lower temperatures.
Jobs a good un..... 50/50 mix all in. Temp on a run, between 77-85, in traffic, sky's the limit... So must be working ok??
No points for me though.... £25 down after purchasing putoline premix..... Chicken!